A square matrix in which every off-diagonal entry is zero is called a:
Azero matrix
Bdiagonal matrix
Crow matrix
Dsymmetric matrix
Answer & Solution
Correct answer: B. diagonal matrix
Diagonal matrix: a_ij = 0 for i ≠ j.
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Penalty for wrong answers : THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE Penalty for wrong answers : THERE WILL BE PENALTY FOR WRONG ANSWERS MARKED BY A CANDIDATE For [[1,2],[2,4]], the determinant equals:If A is invertible, |A^{−1}| equals:For a 3 × 3 non-singular A with |A| = 5, the value of |adj A| is:For a non-singular square matrix A of order n, |adj A| equals:For non-singular A, B of the same order, (AB)^{−1} equals:For a non-singular A, (A^{−1})^{−1} equals: